Which of these statements are true? Check all that apply. 1. The two most abundant gases in the atmosphere are nitrogen and oxygen. 2. Most of the gases that make up the atmosphere are located close to the Earth's surface. 3. The atmosphere consists of a homogeneous mixture of gases.

The necleus of an atom is made up of what subatomic particles?

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.